I've never really been one for the whole carabiner-on-the-backpack thing, but if you like to equip yourself to scale tall buildings at any given moment, Brando's new USB Carabiner Flash Drive should fit your motif rather nicely.

The Hong Kong-based seller of everything strange and USB-based is selling these 4GB drives for $32 a pop. They come in silver, gold, red, black, purple, and blue, and like real caribiners, they clip on and off your bag with ease. Of course, I wouldn't recommend actually using the drives to scale anything--in fact, if you see someone walking past the New York Times building with a couple of these, it's probably best to alert the authorities immediately.